90 add second theme

[riadhmouamnia]

Theme Implementation and UX Enhancement

fixes #90

Description:
I've successfully implemented the specified tasks for the second theme, scroll-to-top button, and smooth scrolling between sections. Here's a brief overview of the accomplished tasks:

1. Second Theme Implementation:

   • Introduced a new theme option for the website.
   • Created a toggle button to enable users to switch between the two themes seamlessly.
   • Ensured the new theme maintained a consistent color scheme, adjusting any existing colors and CSS for a harmonious appearance.

2. Scroll to Top Button:

   • Implemented a functional button that smoothly scrolls the page to the top upon clicking.
   • Ensured the button was accessible and functional across all pages.

3. Smooth Scrolling Between Sections:

   • Added smooth scrolling functionality when navigating between different sections on the website.
   • Note: Animation for section transitions is intentionally deferred, pending the landing page sections' design implementation by other teammates.

I kindly ask my fellow teammates to review this Pull Request and provide valuable feedback. Additionally, I'm aware that animations are pending for the landing page sections, and I appreciate any contributions in that regard. Your insights and approval are crucial for merging these enhancements into the main project. Thank you for your collaboration! 🚀🌐💻

Related Issue

• Resolve Add second theme #90

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Name	Status	Preview	Updated (UTC)
team-a	✅ Ready (Inspect)	Visit Preview	Nov 17, 2023 2:07pm

[liliumorion]

As usual, amazing job @riadhmouamnia , I loved the second theme. I felt very comfortable using our website in night mode, thank you for your diligence, you may now merge your PR.